CN106907302B - Bidirectional asymmetric slip torque limiter - Google Patents
Bidirectional asymmetric slip torque limiter Download PDFInfo
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- CN106907302B CN106907302B CN201710142999.7A CN201710142999A CN106907302B CN 106907302 B CN106907302 B CN 106907302B CN 201710142999 A CN201710142999 A CN 201710142999A CN 106907302 B CN106907302 B CN 106907302B
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- input shaft
- torque limiter
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- 230000002457 bidirectional effect Effects 0.000 title abstract description 15
- 230000000670 limiting effect Effects 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Transmission Devices (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention relates to the technical field of torque limiters, in particular to a bidirectional asymmetric slipping torque limiter, which comprises an input sleeve, an input shaft and a connecting cylinder, wherein the input shaft is arranged at one end of the connecting cylinder in a sliding way along the axial direction of the input shaft. The bidirectional slip torque limiter sets higher slip torque to ensure normal operation of the device and avoid receiving larger forward impact, and the unidirectional slip torque limiter sets lower slip torque to weaken reverse impact received by the device during normal operation. Therefore, the bidirectional asymmetric slipping protection is realized, forward overload protection is provided, and meanwhile reverse impact between the generator and the gear box is weakened, so that the protection of the gear box and other equipment is realized.
Description
Technical Field
The invention relates to the technical field of torque limiters, in particular to a bidirectional asymmetric slipping torque limiter.
Background
The wind driven generator drives the impeller to rotate through natural wind, so that the impeller drives the gear box, and finally, power is transmitted between the gear box and the generator through the installation of the coupler, so that the generator rotates to generate electricity. In order to prevent the damage of the gearbox or the generator caused by the excessive torsion between the gearbox and the generator, a traditional torque limiter is usually added on the coupler, and the traditional torque limiter usually mainly plays a role of forward overload protection. The transmission system of the wind generating set has reverse torque, and the torque force of reverse impact is far smaller than the slip torque force of the set forward overload protection and is insufficient to trigger the traditional torque limiter to slip, so that the torque limiter cannot avoid or weaken the reverse impact force, and internal parts can be damaged for a long time.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that a generator or a gear box is damaged by reverse torque impact of a transmission system of a wind generating set while forward overload protection is provided, the bidirectional asymmetric slipping torque limiter has a forward overload protection function and a reverse impact protection function, and meanwhile has different slipping torque levels in the forward and reverse directions and plays a role in protection.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a two-way asymmetric torque limiter that skids, includes input sleeve, input shaft and connecting cylinder, the input shaft is along its axial slip setting in the one end of connecting cylinder, be equipped with on the input shaft and be used for limiting connecting cylinder radial displacement's first stop gear, the connecting cylinder in with be equipped with first spring between the input shaft, the input sleeve is located between input shaft and the connecting cylinder, the contact surface of input sleeve and input shaft and input sleeve and connecting cylinder are frictional connection, fixedly connected with backstop between input sleeve and the input shaft, the one end that the connecting cylinder kept away from first spring is provided with the output shaft along its axial slip, be equipped with on the output shaft and be used for limiting connecting cylinder radial displacement's second stop gear, in the connecting cylinder with be equipped with the second spring between the output shaft, be equipped with output sleeve between the output shaft, output sleeve and output shaft's contact surface and output sleeve and connecting cylinder's contact surface are frictional connection.
When the wind turbine generator is used, firstly, the torsion of the friction connection between the contact surface of the input sleeve and the input shaft and the torsion of the friction connection between the contact surface of the input sleeve and the connecting cylinder can be set to be smaller, the torsion of the friction connection between the contact surface of the output sleeve and the output shaft and the torsion of the friction connection between the contact surface of the output sleeve and the connecting cylinder can be set to be larger, the torsion on the input shaft and the torsion on the output shaft are unequal, the power is input through the impeller and drives the input sleeve to rotate, at the moment, the torsion is in a normal range, and as a backstop is arranged between the input shaft and the input sleeve, the backstop drives the input shaft to rotate together, so that the connecting cylinder rotates along with the input shaft, and simultaneously drives the output shaft at the other end of the connecting cylinder to rotate, so that the power is transmitted to the generator; meanwhile, when the input torque of the impeller is overlarge, as the backstop is arranged between the input shaft and the input sleeve, the input sleeve can only slip in one direction and lock in the other direction, the input sleeve transmits the torque to the input shaft, the input shaft is transmitted to the connecting cylinder, the connecting cylinder is transmitted to the output shaft, and the friction force set between the output sleeve and the output shaft and between the output sleeve and the connecting cylinder is smaller than the input torque, at the moment, the output sleeve is disconnected, so that the power input of the generator is not generated; when the impeller rotates reversely, the input sleeve can only slip in one direction and can be locked in the other direction due to the arrangement of the backstop between the input shaft and the input sleeve, and simultaneously the torsion of the friction connection between the input sleeve and the contact surface of the input shaft and the torsion of the friction connection between the input sleeve and the contact surface of the connecting cylinder are set to be smaller, so that the input sleeve can directly overcome the friction force to be disengaged from idle running.
In order to realize radial limiting of the input shaft, further, the first limiting mechanism comprises a first spline groove arranged on the input shaft, the connecting cylinder is provided with a first spline tooth matched with the first spline groove, and the first spline groove is arranged on the first spline tooth. Through the cooperation of first spline groove on the input shaft and first spline tooth on the connecting cylinder, can satisfy the input shaft and move by a small margin on the connecting cylinder, can have radial spacing effect again, prevent relative rotation between input shaft and the connecting cylinder.
In order to realize radial limiting of the output shaft, further, the second limiting mechanism comprises a second spline groove arranged on the output shaft, the connecting cylinder is provided with a second spline tooth matched with the second spline groove, and the second spline groove is arranged on the second spline tooth. Through the cooperation of second spline groove on the output shaft and the second spline tooth on the connecting cylinder, can satisfy the output shaft and move by a small margin on the connecting cylinder, can have radial limiting effect again, prevent relative rotation between output shaft and the connecting cylinder.
In order to facilitate the installation and maintenance of the first spring and the second spring, further, the connecting cylinder is formed by mutually splicing a first flange plate, a cylinder and a second flange plate, wherein the first flange plate is arranged at one end of the cylinder, and the second flange plate is arranged at the other end of the cylinder. The connecting cylinder is divided into the first flange plate, the cylinder and the second flange plate, so that the first spring between the input shaft and the connecting cylinder is convenient to install, and the second spring between the output shaft and the connecting cylinder is convenient to install and maintain.
In order to realize the friction connection among the input shaft, the input sleeve and the connecting cylinder, friction plates are further arranged between the contact surfaces of the input sleeve and the input shaft and between the contact surfaces of the input sleeve and the connecting cylinder. The friction plate is arranged on the contact surface among the input shaft, the input sleeve and the connecting cylinder, so that when the torque force is larger than the friction force among the input shaft, the input sleeve and the connecting cylinder, the input sleeve is disengaged, and the safety protection effect is achieved.
In order to realize the friction connection among the output shaft, the output sleeve and the connecting cylinder, further, friction plates are arranged between the contact surfaces of the output sleeve and the output shaft and between the contact surfaces of the output sleeve and the connecting cylinder. The friction plate is arranged on the contact surface among the output shaft, the output sleeve and the connecting cylinder, so that when the torque force is larger than the friction force among the output shaft, the output sleeve and the connecting cylinder, the output sleeve is separated, and the safety protection effect is achieved.
In order to facilitate the installation and maintenance of the backstop, further, the inner ring of the backstop is fixedly connected with the input shaft through a flat key, and the outer ring of the backstop is fixedly connected with the input sleeve through a flat key. The backstop is fixed between the input shaft and the input sleeve in a flat key connection mode, and the structure is simple, the installation is convenient, and the daily maintenance is also convenient.
Preferably, the first spring and the second spring are belleville springs. The belleville spring has high rigidity and high buffering and vibration absorbing capacity, can bear large load with small deformation, and is suitable for occasions with small axial space requirements.
The beneficial effects of the invention are as follows: when the bidirectional asymmetric slipping torque limiter is used, one bidirectional slipping torque limiter is connected in series with one unidirectional slipping torque limiter, and the torque limiter limits the torque transmitted by a transmission system in a slipping mode, and automatically restores connection after overload condition disappears. The bidirectional slip torque limiter sets higher slip torque to ensure normal operation of the device and avoid receiving larger forward impact, and the unidirectional slip torque limiter sets lower slip torque to weaken reverse impact received by the device during normal operation. The invention not only has the forward overload protection function, but also has the reverse overload protection function, and simultaneously has the function of protecting the motor at different slipping torque levels in the forward and reverse directions. Therefore, the bidirectional asymmetric slipping protection is realized, forward overload protection is provided, reverse impact between the generator and the gear box is weakened, the gear box and other equipment are protected, and meanwhile, the bidirectional asymmetric slipping protection has a shock absorption or damping effect.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a front view of a bi-directional asymmetric slip torque limiter of the present invention;
FIG. 2 is a left side view of the bi-directional asymmetric slip torque limiter of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
fig. 4 is a sectional view of B-B in fig. 1.
In the figure: 1. input sleeve, 2, input shaft, 3, first spring, 4, output sleeve, 5, output shaft, 6, second spring, 7, connecting cylinder, 701, first flange, 702, drum, 703, second flange, 8, backstop, 9, friction disc, 10, flat key.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Examples
As shown in fig. 1-4, a bidirectional asymmetric slipping torque limiter comprises an input sleeve 1, an input shaft 2 and a first flange 701, wherein the input shaft 2 is arranged on the first flange 701 in a sliding manner along the axial direction of the input shaft 2, a first limiting mechanism for limiting the radial displacement of the first flange 701 is arranged on the input shaft 2, a first spring 3 is arranged between the first flange 701 and the input shaft 2, the input sleeve 1 is positioned between the input shaft 2 and the first flange 701, the contact surface of the input sleeve 1 and the input shaft 2 and the contact surface of the input sleeve 1 and a connecting cylinder 7 are in friction connection, a first limiting shaft shoulder is arranged on the input shaft 2, the friction plate 9 between the input shaft 2, the input sleeve 1 and the first flange 701 is compressed and forms friction connection through the spring force of the first spring 3, a backstop 8 is fixedly connected between the input sleeve 1 and the input shaft 2, an output shaft 5 is arranged on the second flange 703 in a sliding manner along the axial direction of the second flange 703, the output shaft 5 is provided with a second limiting mechanism for limiting the radial displacement of the input sleeve 7, and the output shaft 7 is connected with the output shaft 5, and the output shaft 4 is connected with the output shaft 4 through the friction sleeve 703, and the friction sleeve 7 is connected with the output shaft 4, and the output shaft 4 is in contact surface of the friction sleeve 7 is connected with the output shaft 4, and the friction sleeve 4. The output shaft 5 is provided with a second limiting shaft shoulder, and the friction plate 9 among the output shaft 5, the output sleeve 4 and the second flange 703 can be pressed tightly and form friction connection through the spring force of the second spring 6 and the axial displacement of the second flange 703.
The first limiting mechanism comprises a first spline groove arranged on the input shaft 2, a first spline tooth matched with the first spline groove is arranged on the connecting cylinder 7, and the first spline groove is arranged on the first spline tooth.
The second limiting mechanism comprises a second spline groove arranged on the output shaft 5, a second spline tooth matched with the second spline groove is arranged on the connecting cylinder 7, and the second spline groove is arranged on the second spline tooth.
The connecting cylinder 7 is formed by mutually splicing a first flange plate 701, a cylinder 702 and a second flange plate 703, wherein the first flange plate 701 is arranged at one end of the cylinder 702, and the second flange plate 703 is arranged at the other end of the cylinder 702. The first flange 701, the cylinder 702, and the second flange 703 are fixedly connected by bolts.
Friction plates 9 are arranged between the contact surfaces of the input sleeve 1 and the input shaft 2 and between the contact surfaces of the input sleeve 1 and the connecting cylinder 7.
Friction plates 9 are arranged between the contact surfaces of the output sleeve 4 and the output shaft 5 and between the contact surfaces of the output sleeve and the connecting cylinder 7.
The inner ring of the backstop 8 is fixedly connected with the input shaft 2 through a flat key 10, and the outer ring of the backstop 8 is also fixedly connected with the input sleeve 1 through the flat key 10.
The first spring 3 and the second spring 6 are belleville springs.
When the bidirectional asymmetric slipping torque limiter is used, one end of the input sleeve 1 is fixedly connected with the output shaft 5 of the gear box, the output sleeve 4 is fixedly connected with the coupler, the coupler is fixedly connected with the input end of the generator, the gear box is driven by the impeller, the gear box transmits power to the input sleeve 1, the power is transmitted to the input shaft 2 through the input sleeve 1 and the backstop 8 on the input shaft 2, the input shaft 2 is transmitted to the first flange 701, the first flange 701 reaches the second flange 703 through the cylinder 702, the second flange 703 transmits the power to the output shaft 5, the output shaft 5 is transmitted to the output sleeve 4, and finally the output sleeve 4 is transmitted to the coupler and drives the generator to rotate, so that the generator is used for generating power; when the slip torque among the input shaft 2, the input sleeve 1 and the first flange plate 701 is far smaller than the slip torque among the output shaft 5, the output sleeve 4 and the second flange plate 703, and the transmitted torque of the impeller is larger than the slip torque among the second flange plate 703, the output shaft 5 and the output sleeve 4, the spring force of the second spring 6 is overcome, so that the output shaft 5 can slide slightly in the direction far away from the input shaft 2, the distance between the second flange plate 703 and the output sleeve 4 and the distance between the output shaft 5 and the output sleeve 4 are increased, the friction plate 9 is invalid, the output sleeve 4 is disengaged and slipped, and the safety protection function is realized; when the torque driven by the impeller is not greater than the slip torque between the second flange 703, the output shaft 5 and the output sleeve 4, and when the wind generating set transmission system has reverse impact, the output sleeve 4 reversely transmits the torque, and the reverse impact torque is far less than the slip torque of the output sleeve 4 and is insufficient to overcome the disengagement of the output sleeve 4, the reverse impact torque is transmitted to the second flange 703, reaches the first flange 701 through the cylinder 702, and is transmitted to the input shaft 2, and at the moment, the reverse impact torque is greater than the slip torque among the input shaft 2, the input sleeve 1 and the first flange 701, so that the output sleeve 4 is disengaged, the reverse impact torque cannot be transmitted to the gear box, and the effect of protecting the gear box is achieved; when the impeller rotates reversely, the backstop 8 enables the input sleeve 1 to slide in one direction, the input sleeve 1 is locked in the other direction, the torque of the input sleeve 1 is far greater than the sliding torque among the input shaft 2, the input sleeve 1 and the first flange 701, the contact surface between the input sleeve 1 and the input shaft 2 and the contact surface between the input sleeve 1 and the first flange 701 are caused to slide, the input sleeve 1 is disengaged, the power cannot be transmitted to the generator, and the effect of protecting the generator is achieved. The bidirectional asymmetric slipping torque limiter is universally applied, and the invention takes a fan as an example, but is not limited to the fan, and can be suitable for occasions of reverse impact generated during torque transmission among various transmission parts and plays a role in forward overload protection among the transmission parts.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. A bi-directional asymmetric slip torque limiter, characterized by: comprises an input sleeve (1), an input shaft (2) and a connecting cylinder (7), wherein the input shaft (2) is arranged at one end of the connecting cylinder (7) in an axial sliding manner, a first limiting mechanism for limiting the radial displacement of the connecting cylinder (7) is arranged on the input shaft (2), a first spring (3) is arranged between the connecting cylinder (7) and the input shaft (2), the input sleeve (1) is positioned between the input shaft (2) and the connecting cylinder (7), the contact surface of the input sleeve (1) and the input shaft (2) and the contact surface of the input sleeve (1) and the connecting cylinder (7) are in friction connection, a backstop (8) is fixedly connected between the input sleeve (1) and the input shaft (2), one end of the connecting cylinder (7) far away from the first spring (3) is provided with an output shaft (5) in an axial sliding manner, a second limiting mechanism for limiting the radial displacement of the connecting cylinder (7) is arranged on the output shaft (5), a second spring (6) is arranged between the connecting cylinder (7) and the output shaft (5), the output shaft (4) is arranged between the output shaft (7), the contact surface of the output sleeve (4) and the output shaft (5) and the contact surface of the output sleeve (4) and the connecting cylinder (7) are in friction connection.
2. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: the first limiting mechanism comprises a first spline groove arranged on the input shaft (2), a first spline tooth matched with the first spline groove is arranged on the connecting cylinder (7), and the first spline groove is arranged on the first spline tooth.
3. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: the second limiting mechanism comprises a second spline groove arranged on the output shaft (5), a second spline tooth matched with the connecting cylinder (7) is arranged on the connecting cylinder, and the second spline groove is arranged on the second spline tooth.
4. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: the connecting cylinder (7) is formed by mutually splicing a first flange plate (701), a cylinder (702) and a second flange plate (703), wherein the first flange plate (701) is arranged at one end of the cylinder (702), and the second flange plate (703) is arranged at the other end of the cylinder (702).
5. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: friction plates (9) are arranged between the contact surfaces of the input sleeve (1) and the input shaft (2) and between the contact surfaces of the input sleeve (1) and the connecting cylinder (7).
6. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: friction plates (9) are arranged between the contact surfaces of the output sleeve (4) and the output shaft (5) and between the contact surfaces of the output sleeve and the connecting cylinder (7).
7. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: the inner ring of the backstop (8) is fixedly connected with the input shaft (2) through a flat key (10), and the outer ring of the backstop (8) is fixedly connected with the input sleeve (1) through the flat key (10).
8. The bi-directional asymmetric slip torque limiter according to claim 1, wherein: the first spring (3) and the second spring (6) are belleville springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142999.7A CN106907302B (en) | 2017-03-10 | 2017-03-10 | Bidirectional asymmetric slip torque limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142999.7A CN106907302B (en) | 2017-03-10 | 2017-03-10 | Bidirectional asymmetric slip torque limiter |
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| Publication Number | Publication Date |
|---|---|
| CN106907302A CN106907302A (en) | 2017-06-30 |
| CN106907302B true CN106907302B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710142999.7A Active CN106907302B (en) | 2017-03-10 | 2017-03-10 | Bidirectional asymmetric slip torque limiter |
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| Country | Link |
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| CN (1) | CN106907302B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464581A (en) * | 2021-07-09 | 2021-10-01 | 上海电气风电集团股份有限公司 | Shaft coupling and wind generating set comprising same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4883152A (en) * | 1987-05-21 | 1989-11-28 | Societe Equipements Electriques Moteur | Starter drive assemblies for internal combustion engines of the type having an overrunning clutch |
| JPH07190083A (en) * | 1993-12-28 | 1995-07-28 | Seiko Instr Inc | Torque limiter |
| EP2333330A2 (en) * | 2009-12-10 | 2011-06-15 | Centa-Antriebe Kirschey GmbH | Coupling with overload clutch for a wind turbine |
| CN103069159A (en) * | 2010-08-18 | 2013-04-24 | 埃博集团有限公司 | Wind turbine torque limiting clutch system |
| CN206582065U (en) * | 2017-03-10 | 2017-10-24 | 利恩传动设备（常州）有限公司 | Two-way asymmetric breakaway torque limiter |
-
2017
- 2017-03-10 CN CN201710142999.7A patent/CN106907302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4883152A (en) * | 1987-05-21 | 1989-11-28 | Societe Equipements Electriques Moteur | Starter drive assemblies for internal combustion engines of the type having an overrunning clutch |
| JPH07190083A (en) * | 1993-12-28 | 1995-07-28 | Seiko Instr Inc | Torque limiter |
| EP2333330A2 (en) * | 2009-12-10 | 2011-06-15 | Centa-Antriebe Kirschey GmbH | Coupling with overload clutch for a wind turbine |
| CN103069159A (en) * | 2010-08-18 | 2013-04-24 | 埃博集团有限公司 | Wind turbine torque limiting clutch system |
| CN206582065U (en) * | 2017-03-10 | 2017-10-24 | 利恩传动设备（常州）有限公司 | Two-way asymmetric breakaway torque limiter |
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| CN106907302A (en) | 2017-06-30 |
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